The SBUR04 matches all of our lower receivers perfectly and has a milspec front end that is compatible with any AR15 barrel nut any AR15 handguard out there including those with rear facing tabs. This receiver is meant for .223 5.56 .224 Valkyrie 300 BLK and 6.5 Grendel calibers. Port opening is not large enough for 450 Bushmaster 458 SOCOM or 50 Beowulf. Made from 7075T6 just like our lower receivers. Anodized black. Comes with forward assist kit dust cover installed.
STOCK NOTICE: This item is NOT marked "In Stock". We will contact you within 12-24 hours by email if your order is on backorder with our distributor and will take longer than the 5-7 business days it takes us to ship out. Please do not order if you need this item shipped immediately.